3
Xray of ankle joint
by afrah alotaibi
Outline
Outline
- Anatomy
- Indications
- Technique (position, land mark, parameter)
- Evaluation criteria
- Short medical history and clinical findings
- Diagnosis as seen in x-ray image
- Management of the case
Ankle anatomy:
Formed by 3 bones: The tibia, the fibula (leg bones), and the talus.
Lateral malleolus is the expanded distal end of the fibula that extends well down alongside the talus. Medial malleolus is the medial elongated process of the tibia. Also it extends down alongside medial talus.
* Ankle mortise is a socket at the inferior portions of tibia and fibula for fitting the upper talus bone.
* The ankle joint is a synovial joint of the hinge type with dorsiflexion and planter flexion movements only
Ankle anatomy:
Bony lesions or diseases involving the ankle joint, distal tibia and fibula, proximal
talus, and proximal fifth metatarsal.
Evaluation of fractures and dislocations
Indications
Before start the examination:
- Patient identification
- Protection of fetus
- Remove radiopaque material
- Explanation of the procedure
- shielding
Before start the examination:
- AP
- AP 15 internal rotation
- ap oblique lateral
Basic projections:
Basic projections:
Ap ankle:
Kvp: 70 +-5
mAs: 6
SID: 40’’ (102CM)
- Position:
- Supine or seated on table, leg extended, support under knee .
- Align leg and ankle parallel to edge of IR
- True AP, ensure no rotation, long axis of foot vertical and parallel to CR.
- CR: perpendicular to midway between malleoli .
- Collimation: collimate to lateral skin margins; include
- proximal one-half of metatarsals and distal tibia- fibula.